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(No Model.) 2 Sheets-Sheet 1.

J. B. MOONEY.

CYLINDER DRAIN COOK.

No. 252,959. Patented Jan. 31,1882.

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(N0 Model.) 2 Sheets-Sheet 2.

J. B. MOONEY.

CYLINDER DRAIN 000K.

UNITED STATES PATENT OFFICE.

JOHN B. MOONEY, OF CINCINNATI, OHIO, ASSIGNOR TO EDVARI) F. BRAD- FORDAND THORNIIILL E. MOONEY, BOTH OF SAME PLACE.

CYLINDER DRAIN-COCK.

SPECIFICATION forming part of Letters Patent No. 252,959, dated January31', 1882.

Application filed August 15, 1881.

To all whom it may concern.-

Be it known that I, JOHN B. MooNEY, of Uincinuati, in the county ofHamilton and State of Ohio, have invented certain new and usefulImprovements in Oylinder Drain-(Jocks, of which the following is aspecification.

My invention relates to cooks for draining the water of condensation andprimage from steam-engine cylinders during and for each exhaust strokeof the piston; and it consists in the operation of the drain valves orcocks by means of a positive connection with the valvestem, valve-lever,rocker-arm, cross-head, or some other suitable moving part of the enine, whereby the drain-cock is opened and closed. simultaneously withthe opening and closing movement of the exhaust-valve for eachsuccessive stroke of the piston.

Many devices have been proposed for the automatic removal ofthe water ofcondensation and primage from the cylinder of an engine, eitherregularly or as it may accumulate in sufficient quantity to require venting; but none of these are entirely free from objection, nor do theyopen and close with the certainty necessary to the successful operationof a device of this character. One style, in use to some extent onlocomotives, is opened by means of an im-lined plane on a sliding bar,and closed by a spring or the pressure of steam; but springs are liable.to weaken under continuous strain and fail to properly close the cock,and those devices which are closed by steam-pressure are liable toleakage of live steam from the wear of valve and seat, due to the severebeating of the valve in closing. Theautomaticcylinder-cock, which isopened and closed by steam-pressure, is not only liable to rapidly wearthe valve and seat, but is also liable to stick and remain open at timesduring the steam-stroke of the piston. The spring-cock, arranged to openwhenever the accumulation of water in the cylinder fills (No model.)

Another contrivancc for effecting the dis- 5o charge of the waterot'condensation accumulating in the cylinder consists in a rod connectedwith a valve at each end of the cylinder and extending to the cab of thelocomotive-engine, where said rod can be manipulated by the engineer toopen and close said valves. Such contrivance is objectionable, becauseit requires the watchful care of an attendant, and therefore the openingand closing of the drain-cocks is not automatically eiiected in unisonwith the opening and closing of the exhaust of the en- 'gine.

In my positive-motion drain-cock, the construction and operation ofwhich will be fully described hereinafter, the action of the cock orvalve controlling the drain is coincident with the op'uiing and closingof the exhaust, it is opened and closed with the same rate of motion,and will wear as long as will the steam and exhaust valves of theengine. It is adapt- 7o able to all types of engine, and the motion toopen and close the drains from the ends of the cylinder may be takenfrom the exhaust-lever on marine engines, from the valve-stem orrocker-arm on locomotive and slide-valve engincs, or it may in all casesof attachment to slide-valve engines be worked from the valvestem, theessential requisite being that the cock or valve controlling the drainsshall open when the exhaust opens and close when the exhaust closes by apositive connection with the actuating valve -lever, valve stem, orroeker-arm ot' the engine.

In the accompanying drawings, Figure l is an elevation from the exhaustside of the cylinder ot a leverengine. Fig. 2 is an elevation of alocomotivc-cylindcr, and Fig. 3 is a sectional elevation of a cylinderand steam-chest of an ordinary slide-valve engine, all showing myimproved method of operating the cylinder drain-cocks.

Similar letters of reference indicate similar parts.

A is the cylinder ofa steam-engine, provided with the customary steamand exhaust p.1s- 5 sages, piston, and valve-gear.

I3 [5, Fig. l, are the exhaustlevers, operating corresponding valves, 1)I).

C G are the cylinder drain-cocks, connected with the levers B B bypendent rods 0 c. The cocks O O are simplytwo-seat or double-seatpuppet-valves, connected to the levers 13 B at such a point as toproduce the requisite lift of the valves 0 c to vent the drainage fromthe'cylinder. The pendent rods 0 c are preferably constructed withscrewjoints to adjustthe valves 0 or c to their respective seats, inorder that the exhaust-valve b or I) and valves 0 and 0 may open andclose at precisely the same time.

The rising movement of the levers B B is effected by the customary camor eccentric, cam-rod, rocker-shaft, and oscillatinglifters b and bwhile the falling movementof the levers is effected by gravity and thepressure of steam. It is obvious that directly either lever B or B israised by its corresponding lifter to open the exhaust-valve I) or b thecorresponding drain-cock G or G will be opened to vent the water ofcondensation and primage from the corresponding end of the cylinder Athrough the connecting drain-pipe c.

In Fig.2 the method is shown applied to the cylinder of alocomotiveengine, of which D is the valve-stem, provided with a collarand stud, d, which engages with a slotted lever, d, pivoted to asuitable standard, d secured to the lower guide-bar of the engine. At apoint on the lever 67, where the motion thereof is sufficient to throwthe balanced piston-valve E (shown in section in Fig. 3) to connect thedrain-pipes c c alternately with the exit-pipe c, a connection is madewith the valve-stem c, whence the motion of the valve E, andconsequently the connection of the exhaust end of the cylinder A withthe drainage-exit c, is made, as the slide-valve F, (shown in section inFig. 3,) controlling the distribution of steam to the cylinder A,connects first one end and Y then the other with the exhaust-pipe G.(Shown ing action of the valve E is so proportioned in time and quantityas to open and close the drain pipes 0 and 0 simultaneously with theopening and closing of the exhaust for the respective ends of thecylinder.

The form of valve which I prefer for slidevalve and locomotive enginesis shown in section, Fig. 3, and consists of a cylindrical shell, 0,having annular ports 0 c, with which the opposite ends of the cylinderare connected by drain-pipes c and 0 A piston, E, with a central annularrecess, 0, is closely fitted to the cylinder 0, and so proportioned asto cover one or the other of the annular ports 0" c before the oppositeof said ports is uncovered and connected with the drainageexit c.

In Fig. 1 I have shown in detail a form of puppet-valve such as I preferto use with leverengines.

It is obvious that my method of operating cylinder drain-cocks can besuccessfully adapted to all types of engine, and that while the actionof the valves or cocks is positive in both the'opening and closingmovements, it is also of such a nature as to furnish a prompt andcomplete opening of the drain-pipes, and to seat the valves in suchamanner as to insure the greatest possible durability of valve and seat.

Although the drawings show the forms of valves or cocks and methods ofconnection which I prefer, I do not wish to be limited to these preciseforms of valves and connections, as certain situations and constructionsof engines may require special forms of drain-valves and more complexarrangements of connecting-gear to eii'ect the drainage of cylinders bypositive means.

I am aware that automatic cylinder-cocks which alternately open andclose the drainpipes by direct steam-pressure and automatic cylindercocks which are opened by suitable mechanism or by excessive pressureand closed by springs are not new, and these I do not claim.

\Vhat I claim is- The combination of the moving parts of the cylinderdrain-cocks with a moving part of the engine, substantially asdescribed, whereby the opening and closing movements of the said cocksare coincident with the opening and closing of the cxhaustofthecngine,as set-forth.

In testimony whereof lliave signed my name to the foregoingspecification in the presence of two subscribing witnesses.

JOHN B. MOONEY.

Witnesses:

EDGAR J, Guoss, GEO. N. SAMSON.

